Diff of the two buildlogs:

--
--- b1/build.log	2024-11-16 00:28:33.017543715 +0000
+++ b2/build.log	2024-11-16 00:29:57.881691481 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Dec 18 18:50:10 -12 2025
-I: pbuilder-time-stamp: 1766127010
+I: Current time: Sat Nov 16 14:28:35 +14 2024
+I: pbuilder-time-stamp: 1731716915
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking golang-github-esiqveland-notify_0.13.3-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2426962/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink02-arm64.
+I: Changing host+domainname to test build reproducibility
+I: Adding a custom variable just for the fun of it...
+I: Changing /bin/sh to bash
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Nov 16 00:28 /bin/sh -> /bin/bash
+I: Setting pbuilder2's login shell to /bin/bash
+I: Setting pbuilder2's GECOS to second user,second room,second work-phone,second home-phone,second other
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="32" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.32(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='a4cd6ffd8fac4f13a21986916eee6a74'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='2426962'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=5b7b8cf8c139493d9cc6c481e99fdbeb
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path
+  PBCURRENTCOMMANDLINEOPERATION=build
+  PBUILDER_OPERATION=build
+  PBUILDER_PKGDATADIR=/usr/share/pbuilder
+  PBUILDER_PKGLIBDIR=/usr/lib/pbuilder
+  PBUILDER_SYSCONFDIR=/etc
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=1079196
   PS4='+ '
-  PWD='/'
-  SHELL='/bin/bash'
-  SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.QFkp1jUK/pbuilderrc_pnK6 --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.QFkp1jUK/b1 --logfile b1/build.log golang-github-esiqveland-notify_0.13.3-2.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.QFkp1jUK/pbuilderrc_eTfI --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.QFkp1jUK/b2 --logfile b2/build.log golang-github-esiqveland-notify_0.13.3-2.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink03-arm64 6.1.0-27-cloud-arm64 #1 SMP Debian 6.1.115-1 (2024-11-01) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-27-cloud-arm64 #1 SMP Debian 6.1.115-1 (2024-11-01) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2426962/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -156,7 +188,7 @@
 Get: 39 http://deb.debian.org/debian unstable/main arm64 golang-github-stretchr-objx-dev all 0.5.2-1 [25.5 kB]
 Get: 40 http://deb.debian.org/debian unstable/main arm64 golang-gopkg-yaml.v3-dev all 3.0.1-3 [74.3 kB]
 Get: 41 http://deb.debian.org/debian unstable/main arm64 golang-github-stretchr-testify-dev all 1.9.0-1 [74.7 kB]
-Fetched 62.3 MB in 1s (92.5 MB/s)
+Fetched 62.3 MB in 1s (99.0 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 20084 files and directories currently installed.)
@@ -335,7 +367,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-esiqveland-notify-0.13.3/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../golang-github-esiqveland-notify_0.13.3-2_source.changes
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-esiqveland-notify-0.13.3/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../golang-github-esiqveland-notify_0.13.3-2_source.changes
 dpkg-buildpackage: info: source package golang-github-esiqveland-notify
 dpkg-buildpackage: info: source version 0.13.3-2
 dpkg-buildpackage: info: source distribution unstable
@@ -354,35 +390,35 @@
    dh_auto_configure -O--builddirectory=_build -O--buildsystem=golang
    dh_auto_build -O--builddirectory=_build -O--buildsystem=golang
 	cd _build && go install -trimpath -v -p 12 github.com/esiqveland/notify github.com/esiqveland/notify/example
-internal/goos
-internal/itoa
+internal/goarch
+internal/unsafeheader
 internal/coverage/rtcov
-internal/godebugs
+internal/itoa
 internal/byteorder
-internal/goarch
 internal/race
-internal/unsafeheader
-internal/goexperiment
+cmp
 internal/profilerecord
+internal/godebugs
+internal/goexperiment
 math/bits
-unicode/utf8
-cmp
-internal/chacha8rand
-runtime/internal/math
-internal/runtime/syscall
-internal/cpu
 internal/abi
-internal/asan
+internal/cpu
+internal/goos
+internal/runtime/syscall
+runtime/internal/math
+math
 unicode
+runtime/internal/sys
+internal/chacha8rand
+unicode/utf8
+internal/asan
 internal/msan
-crypto/internal/alias
 sync/atomic
-crypto/subtle
-math
-crypto/internal/boring/sig
+crypto/internal/alias
 internal/nettrace
-runtime/internal/sys
+crypto/internal/boring/sig
 image/color
+crypto/subtle
 log/internal
 internal/bytealg
 internal/runtime/atomic
@@ -391,64 +427,64 @@
 runtime
 internal/reflectlite
 iter
-internal/weak
 sync
+internal/weak
 slices
 internal/bisect
 internal/testlog
 internal/singleflight
 runtime/cgo
+internal/godebug
 errors
 sort
-internal/godebug
 strconv
 io
-internal/oserror
-path
+bytes
 vendor/golang.org/x/net/dns/dnsmessage
+path
+internal/oserror
 math/rand/v2
 math/rand
-bytes
-strings
-hash
+reflect
 crypto/internal/randutil
-internal/concurrent
+strings
 syscall
-reflect
+hash
 crypto
-unique
+internal/concurrent
+crypto/cipher
 hash/adler32
 hash/crc32
-net/netip
+unique
 bufio
-crypto/cipher
 crypto/internal/boring
-image
+net/netip
 crypto/sha1
+image
 image/internal/imageutil
 image/draw
 image/jpeg
 time
 internal/syscall/unix
 internal/syscall/execenv
+internal/fmtsort
+encoding/binary
+io/fs
 internal/poll
 context
-io/fs
 internal/filepathlite
-internal/fmtsort
-encoding/binary
 os
 fmt
-path/filepath
 io/ioutil
+path/filepath
 net
 os/exec
 math/big
-net/url
-os/user
 encoding/hex
-log
 compress/flate
+net/url
+log
+os/user
 compress/zlib
 image/png
 crypto/rand
@@ -461,7 +497,7 @@
 === RUN   TestExpiration
 --- PASS: TestExpiration (0.00s)
 PASS
-ok  	github.com/esiqveland/notify	0.044s
+ok  	github.com/esiqveland/notify	0.048s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -491,12 +527,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1079196/tmp/hooks/B01_cleanup finished
 I: unmounting dev/ptmx filesystem
 I: unmounting dev/pts filesystem
 I: unmounting dev/shm filesystem
 I: unmounting proc filesystem
 I: unmounting sys filesystem
 I: cleaning the build env 
-I: removing directory /srv/workspace/pbuilder/2426962 and its subdirectories
-I: Current time: Thu Dec 18 18:51:31 -12 2025
-I: pbuilder-time-stamp: 1766127091
+I: removing directory /srv/workspace/pbuilder/1079196 and its subdirectories
+I: Current time: Sat Nov 16 14:29:56 +14 2024
+I: pbuilder-time-stamp: 1731716996